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USN-1732-3: OpenSSL vulnerability

25 March 2013

Several security issues were fixed in OpenSSL.

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Releases

Packages

  • openssl - Secure Socket Layer (SSL) cryptographic library and tools

Details

USN-1732-1 fixed vulnerabilities in OpenSSL. The fix for CVE-2013-0169 and
CVE-2012-2686 was reverted in USN-1732-2 because of a regression. This
update restores the security fix, and includes an extra fix from upstream
to address the AES-NI regression. We apologize for the inconvenience.

Original advisory details:

Adam Langley and Wolfgang Ettlingers discovered that OpenSSL incorrectly
handled certain crafted CBC data when used with AES-NI. A remote attacker
could use this issue to cause OpenSSL to crash, resulting in a denial of
service. This issue only affected Ubuntu 12.04 LTS and Ubuntu 12.10.
(CVE-2012-2686)

Nadhem Alfardan and Kenny Paterson discovered that the TLS protocol as used
in OpenSSL was vulnerable to a timing side-channel attack known as the
"Lucky Thirteen" issue. A remote attacker could use this issue to perform
plaintext-recovery attacks via analysis of timing data. (CVE-2013-0169)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.10
Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

Related notices

  • USN-1732-1: libssl0.9.8, libssl1.0.0, openssl
  • USN-1735-1: openjdk-7, openjdk-7-jre-zero, openjdk-6-jre, openjdk-6, openjdk-7-jre, icedtea-6-jre-jamvm, openjdk-7-jre-lib, openjdk-6-jre-headless, openjdk-7-jre-headless, icedtea-6-jre-cacao, openjdk-6-jre-lib, icedtea-7-jre-jamvm, openjdk-6-jre-zero, icedtea-7-jre-cacao